Fig. 1From: The effect of Tribulus terrestris supplementation on inflammation, oxidative stress, and performance of recreational runners: study protocol for a randomized placebo-controlled trialStudy protocol diagram. TT, Tribulus terrestris; HIIT, high-intensity interval training; VAS, visual analog scale. -t1: 1Â week pre-allocation, t0: allocation, t1: at the beginning of the study, t2: 2Â weeks after the study beginning, and tx: 24 h after t2Back to article page